肥厚型心肌病临床并非少见,严重者可发生左室流出道梗阻。左室流出道是指左室与主动脉之间狭长的解剖学结构,上方为室间隔,下方为二尖瓣前叶。有一定比例的肥厚型心肌病患者存在左室流出道梗阻,这些患者存在主动脉瓣下室间隔局部的明显肥厚,并在收缩期向 Hypertrophic cardiomyopathy clinical is not uncommon, severe left ventricular outflow tract obstruction may occur. Left ventricular outflow tract refers to the narrow anatomical structure between the left ventricle and the aorta, above the ventricular septal, below the anterior mitral valve. A certain percentage of patients with hypertrophic cardiomyopathy have left ventricular outflow tract obstruction, these patients have significant aortic hypertrophy and septal local segmental